Improvement in rock-drilling mechanisms



A. E; ALLEN. Rock-Drilling Machine.

Patented June 22,1875.

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Bah/0.350s

m y m THE GRAPHIC CO.PHOTO -LITH.39&.41 PARK PLACE,N.Y.

UNITED STATES PATENT Orrrcn.

ADDIS E. ALLEN, OF PERGH RIVER, NEW YORK.

IMPROVEMENT IN RocK-DRiLL'ihe MECHANISMS.

Specification forming part of Letters Patent N 0. 164,705, dated J ure22, 1875 application filed March 6, 1875.

To all whom it may concern:

Be it known that 1, ADDIS E. ALLEN, of

Perch River, Jefferson county, New York, have invented certain new anduseful Improvements in Drilling-Machines, of which the following is aspecification: The drilling-machine in which my invention is comprisedoperates on the same general principle as that described and claim ed inmy Letters Patent No. 131,074, dated September 3, 1872, inasmuch as Iemploy a compensating balance-weight and a reciprocating connecting-rod,intermittently engaging a crank or wrist pin on the driving-shaft, asdescribed in my said Letters Patent. My present improvements havereference, principally, to the mechanism by which the feed of the drillis effected and regulated. It also has reference to the arrangement ofthe drop mechanism, to combining with the drilling-machine a mechanismfor operatin g a sand-pump whenever required, and to other features,which will be developed in the course of the description.

I shall now proceed to give a description of the nature of myimprovements, and the manner inwhich the same are or may be carried intoeffect, referring at the same time to the accompanying drawing, in whichFigure l is a perspective view ofa machine embodying my improvements.Fig. 2 is a plan of the same with the mast removed.

A is the driving-shaft, operated from any suitable prime mover. B is themain shaft, driven from shaft A by gearing a b. O is the sliding orreciprocating connectingrod, with a hook or notch, e, at one end tointermittently engage the wrist-pin c of crank d, in the manner and forthe purposes substantially as described and claimed in my Letters Patentaforesaid. The wrist-pin is formed by a pin or stud fastened at one endin the crank'arm, and at the other end in the gear-wheel b, and carryingon that part of itintermediate between the arm and wheel afriction-roller. This arrangement gives strength and stability to thecrank device under the heavy load that it is required to raise. Theconnectingrod moves between guides f near its hooked end, and at theother end is jointed to one arm of an angle-lever,-D, to the other armofwhich is connected the drop or feed rope E.

ject of this arrangement is to regulate the length of stroke. The nearerthe saddle is to -the fulcrum or axis of vibration of the lever theshorter will be the stroke. Other means than the saddle may be employedfor the purpose-as, for instance, a simple eyebolt, through the eye ofwhich the rope can pass but I prefer, on the whole,the arrangement shownin the drawing. When the crank or wrist pin draws forward theconnecting-rod O the lever D will be thereby moved in a direction todepress its upper arm, which will have the effect of drawing down thedrop or feed rope, and, consequently, of elevating the drill. Upondisengagement of the rod 0 from the wrist-pin the drill'will drop byreason of its own weight, forcibly and suddenly drawing up the upper armof the lever. A bumper or bufi'er, J, fixed on the machine above thisarm of the lever, is-provided' to check at the proper point the movementofthe arm when it is jerked upward by the descending drill. Thefeed-rope passes up over a sheave in the top of mast K, and thence tothe rope-clamp F, by which said feed-rope is fastened to the main ropeG, from which is suspended drill rod H. The drop or feed rope passesfrom the saddle g around a small capstan, I, on the shaft of theangle-lever D. Lt makes two or three turns around this capstan, andthence passes to feed-drum J to which it issecured. The arrangement ofthe feed-drum is more clearly indicated in Fig. 3 on an enlarged scale.It is fast on a shaft, K, which has its bearings in the frame of themachine, and is provided at the outer end with a crank-handle, 7c. Theshaft passes loosely through a helicoidal or worm wheel, L, to which isattached a spring-pawl, Z, that works through the wheel against aratchet, m, on the adjoin ing end of the feed-drum. This arrangementwill permit the drum to be rotated by crankhandle it, to wind up thefeed-rope without revolving the worm-wheel, the pawl, when the .drumrotates in this direction, riding over the ratchet-teeth. 'With theworm-wheel is combined a worm-shaft, a, supported in suitable bearings,and meshing with the worm-wheel. To the end of the worm-shaft is affixeda handwheel, by means of which the worm can be rotated to effect therevolution of the wormwheel in either direction-either to wind up or tounwind the feed-rope. I use it principally, however, for the latterpurpose, the combination of the worm, worm-wheel, and feeddrum beingprimarily for the purpose of feedin g the drop-rope from the drum duringthe operation of drilling.

The capstan I is of advantage in that it prevents the feed-works frombeing unduly strained. This capstan I is mounted loosely onits-supporting-shaft, and on its hub is formed a ratchet, 0, which isengaged by a spring-pawl, 1), on the vibratory lever 1', whose axis ofvibration is the capstan-supporting shaft. The free end of the lever isadapted to engage a detent or equivalent device on the drill-frame,which will hold the lever firmly in position when it is not in use. Theobjectof this ratchet, pawl, and lever arrangement isto hold the capstanin position, and to provide, at the same time, a means by which anyslack in the drop-rope can be readily taken up.

The main rope G passes from the drill [-I up over a sheave onthe mast K,and thence to a capstan, M, fast on the main shaft B, around whichcapstan it is coiled loosely two or three times. The object of thisarrangement is to provide for lifting the drill out of the hole. To dothis I first throw the machine out of gear by raising the connecting-barC out of the path of the crank d e. The bar is held in this position byinserting beneath it, and through holes formed at a suitable height inguides f, a pin, f. I then loosen the ropeclamp I, which detaches thedrop-rope E from the main rope G, after which the main rope is takenhold of by its free end, and is hauled tightly on the capstan M.

The machine is now put in motion, and the revolution of the main-shaftcapstan will wind up the main rope, and thus elevate the drillrod untilit is lifted out of the hole, when it is permitted to drop and rest bythe side of the hole. An attendant, of course, holds the free end of therope during this operation, and takes up the slack. It is necessary attimes to thus lift the tools in order to sand-pump. An arrangement forlifting and lowering the pump is shown in the drawing.

N is the sand-pump rope, to the free end of which the sand-pump isconnected. The rope runs up over a sheave on the mast K, and thence to areel, 0, loose on main shaft B. From the side of the reel adjoiningcrank-arm d projects a pin, 8, which, while normally out of the path ofthe crank, will, when the reel is moved endwise on the shaft 13 towardthe crank, lie directly in the path of the crank, in which position thelatter, in its revolution, will engage said pin, and therefore revolvethe reel.

The endwise movement of the sand-pump reel, to throw it into or out ofengagement with the driving mechanism, may be effected in any suitableway. In this instance it is effected by means of an angle'lever, t,pivoted at t, having a forked end, which straddles one rim of the reel.The other end of this angle-lever is pivoted to a connecting-rod, c,which at the other end is jointed to a vibratory lever, 20, by which thesystem of levers is operated to shift the reel to one position or theother.

To saudpump after the drill-tools are lifted out, as above described,the pump can readily be lowered. The reel being out of gear, the pump,by its weight, will be carried to the bottom. To raise the pump, thereel is thrown into gear with the revolving crank-arm, and the sand-pumprope will thereby be wound up on the reel.

I would remark, in conclusion, that with the machinery here shown I alsouse a compensating balance-weight, I. This weight, however, is combinedand arranged to operate in connection with the main shaft insubstantially the same manner as described in my Letters Patent No.131,074, of September 3, 1872. It therefore requires no further mentionhere.

Havingdescribed my invention, and the manner in which the same is or maybe carried into effect, I would state that I do not limit myself to theprecise details herein shown and specified in illustration of myinvention; but

What I claim, and desire to secure by Letters Patent, is

1. The described combination, in the drilling-machine, of the sand-pumpreel and mechanism, substantially as shown and described, to throw saidreel into or out of gear at pleasure with the driving mechanism of thedrilling-machine.

2. In feed mechanism of drilling-machines, the combination, with thefeed-drum, to which is attached the feed or drop rope, of a wormwheeland worm, by which said drum is rotated to effect the feed of the drill,substantially as and for the purposes set forth.

3. The worm-wheel and worm, in combination with the feed-drum, connectedwith the worm-wheel by a ratchet-and-pawl connection, as described,which permits the drum to be rotated by a crank-handle or otherwiseindependently of the worm-wheel, to effect the winding up of thefeed-rope.

4. In combination with the feed-drum and feed-rope, the capstan on theangle-lever shaft, interposed between the feed-drum and the drop, totake the strain from the feed-works, substantially as set forth.

5. In combination with the angle-lever shaft, the feed-rope capstanloose thereon, and the lever, pawl, and ratchet mechanism, for holdingsaid capstan in place, and taking up slack in the drop-rope, as setforth.

6. The combination, with the vibratory angle-lever, of the feed or droprope, operated by said lever, as described, and the feed mechanism,whereby said rope can be let out or taken up during the movement of saidlever, and without stoppage of the machine, substantially as set forth.

' 7. The feed-rope, the feed mechanism for taking up and'letting out thesame While the machine is in motion, and the drop mechanism by-Whichsaid rope is operated to raise and let fall the drill, as described, incombination with the main rope attached to the drill, and normally looseon its capstan when the machine is in operation, as set forth.

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